Question

chem help!! have to make a graph. need help plzz.. thank you!!!! fastttt!!. Make sure to label axes and title the graph. its A heating curve?
Temperature measurements were taken every minute for 35 minutes.

Table 1. Heating of Substance Y.

Time(min) Temp(°C) Time(min) Temp(°C)

0.0 15.2 19.0 92.5

1.0 19.8 20.0 98.7

2.0 24.7 21.0 107.0

3.0 29.2 22.0 109.1

4.0 31.3 23.0 109.4

5.0 32.2 24.0 109.3

6.0 32.0 25.0 109.3

7.0 32.1 26.0 109.3

8.0 32.1 27.0 109.4

9.0 32.1 28.0 109.3

10.0 32.2 29.0 109.4

11.0 35.4 30.0 110.5

12.0 45.0 31.0 111.8

13.0 54.6 32.0 119.6

14.0 61.2 33.0 127.1

15.0 66.8 34.0 133.4

16.0 75.0 35.0 139.7

17.0 83.7

18.0 88.1

1. What is the melting point of this substance? How do you know?

2. What is the boiling point of this substance? How do you know?

3. What phase(s) is/are present at each of the following points in time?

a) 2 min b) 6 min c) 17 min d) 26 min e) 34 min

4. Explain why at the intervals of 5-10 min and 23-29 min the substance is being heated but the temperature is not increasing.

5. Explain how the length of the plateaus in the graph could be changed. (Give at least two ways)

Answer 1

We can't draw diagrams on this forum. You can look up on Google and find heating curves and see the place for phase changes, melting points, etc.